I have an 866mhz Pentium3 pc. I recently had Comsum errors advising me that my battery needed replacement. I have now replaced the battery but at start-up the computer reports the CPU as being 433mhz - 50% of its actual mhz. When I check control panel / system it also reports the CPU as 433mhz. I am sure the BIOS needs amending but can not see anywhere in the BIOS allowing that to be amended. Any suggestions how I can get the other half back?